package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.security.auth.login.LoginException;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Slf4j
@Service
public class UserServiceImpl implements UserService {

    static final String WX_LIGON="https://api.weixin.qq.com/sns/jscode2session";

    @Resource
    private WeChatProperties weChatProperties;
    @Resource
    private UserMapper userMapper;

    @Override
    public User login(UserLoginDTO userLoginDTO) {



        //调用微信接口服务，获取openid

        //存放访问所需的变量
        Map<String, String> map =new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",userLoginDTO.getCode());
        map.put("grant_type","authorization_code");
        String josn = HttpClientUtil.doGet(WX_LIGON, map);

        JSONObject jsonObject = JSON.parseObject(josn);
        String openid = jsonObject.getString("openid");

        //判断openid是否为空 ，则表示登录失败，抛出业务异常
        if (openid == null)
        {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //判断是否为新用户，进行自动注册
        //进行查询数据库返回为null则为新用户
        User user = userMapper.selectByopenid(openid);

        if (user == null)
        {
            user= User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        //返回这个用户对象
        return user;

    }
}
